1. Postdoctoral Research Associate, School of Civil Engineering and Environmental Science, Univ. of Oklahoma, Norman, OK.
2. Asphalt Branch Manager, Oklahoma Dept. of Transportation, Edmond, OK.
3. Asphalt Lab Manager, School of Civil Engineering and Environmental Science, Univ. of Oklahoma, Norman, OK.
4. David Ross Boyd Professor, Aaron Alexander Professor of Civil Engineering, Alumni Chair Professor of Petroleum and Geological Engineering, and Director, Southern Plains Transportation Center, Univ. of Oklahoma, Norman, OK.
5. Graduate Research Assistant, School of Civil Engineering and Environmental Science, Univ. of Oklahoma, Norman, OK.